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Help me:-
Solve the following pair of linear equation by the substiting method:
(ii) 3x+4y=10 and 2x-2y=2
Answers
Answered by
74
Given:-
- (ii) 3x+4y=10 and 2x-2y=2
Solution:-
3x+4y=10 …………..(1)
2x−2y=2 (or) x−y=1 …………(2)
- (1) ⇒(3x+4y=10)1
- (2) ⇒(x−y=1)3
_____________________
3x+4y=10
3x−3y=3
_____________________
7y=7
∴y=1
Put y=1 in (1) we get 3x+4×1=10
3x=10−4=6
∴x=36=2
✅Hence x=2,y=1.
Answered by
5
Answer:
By substitution method, 3 x + 4 y = 1 0 & 2 x − 2 y = 2 ⇒ 2 (x − y) = 2 ⇒ x − y = 1 ___ (2)
∴ x = y + 1 → (1). Substituting in equation (2).
∴ 3 x + 4 y = 1 0 ⇒ 3 (y + 1) + 4 y
= 1 0 ⇒ 3 y + 3 + 4 y
= 1 0 ⇒ 7 y = 7
⇒ y = 1
∴ x = 1 + 1
= 2 ∴
x = 2, y = 1
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